English verb conjugation
CAN RETUNE

Regular verb: retune - retuned - retuned

Affirmation

Simple form	V-ing form
I can retune you can retune she can retune we can retune you can retune they can retune	I can be retuning you can be retuning she can be retuning we can be retuning you can be retuning they can be retuning
Perfect	V-ing perfect
I can have retuned you can have retuned she can have retuned we can have retuned you can have retuned they can have retuned	I can have been retuning you can have been retuning she can have been retuning we can have been retuning you can have been retuning they can have been retuning

Negation

Simple form	V-ing form
I can't retune you can't retune she can't retune we can't retune you can't retune they can't retune	I can't be retuning you can't be retuning she can't be retuning we can't be retuning you can't be retuning they can't be retuning
Perfect	V-ing perfect
I can't have retuned you can't have retuned she can't have retuned we can't have retuned you can't have retuned they can't have retuned	I can't have been retuning you can't have been retuning she can't have been retuning we can't have been retuning you can't have been retuning they can't have been retuning

Interrogative form

Simple form	V-ing form
can I retune? can you retune? can she retune? can we retune? can you retune? can they retune?	can I be retuning? can you be retuning? can she be retuning? can we be retuning? can you be retuning? can they be retuning?
Perfect	V-ing perfect
can I have retuned? can you have retuned? can she have retuned? can we have retuned? can you have retuned? can they have retuned?	can I have been retuning? can you have been retuning? can she have been retuning? can we have been retuning? can you have been retuning? can they have been retuning?

Interro-negative form

Simple form	V-ing form
can't I retune? can't you retune? can't she retune? can't we retune? can't you retune? can't they retune?	can't I be retuning? can't you be retuning? can't she be retuning? can't we be retuning? can't you be retuning? can't they be retuning?
Perfect	V-ing perfect
can't I have retuned? can't you have retuned? can't she have retuned? can't we have retuned? can't you have retuned? can't they have retuned?	can't I have been retuning? can't you have been retuning? can't she have been retuning? can't we have been retuning? can't you have been retuning? can't they have been retuning?